Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016JD026301 |
Validation of high-resolution MAIAC aerosol product over South America | |
Martins, V. S.1; Lyapustin, A.2; de Carvalho, L. A. S.1; Barbosa, C. C. F.1; Novo, E. M. L. M.3 | |
2017-07-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:14 |
文章类型 | Article |
语种 | 英语 |
国家 | Brazil; USA |
英文摘要 | Multiangle Implementation of Atmospheric Correction (MAIAC) is a new Moderate Resolution Imaging Spectroradiometer (MODIS) algorithm that combines time series approach and image processing to derive surface reflectance and atmosphere products, such as aerosol optical depth (AOD) and columnar water vapor (CWV). The quality assessment of MAIAC AOD at 1 km resolution is still lacking across South America. In the present study, critical assessment of MAIAC AOD550 was performed using ground-truth data from 19 Aerosol Robotic Network (AERONET) sites over South America. Additionally, we validated the MAIAC CWV retrievals using the same AERONET sites. In general, MAIAC AOD Terra/Aqua retrievals show high agreement with ground-based measurements, with a correlation coefficient (R) close to unity (R-Terra: 0.956 and R-Aqua: 0.949). MAIAC accuracy depends on the surface properties and comparisons revealed high confidence retrievals over cropland, forest, savanna, and grassland covers, where more than 2/3 (similar to 66%) of retrievals are within the expected error (EE = +/-(0.05 + 0.05 x AOD)) and R exceeding 0.86. However, AOD retrievals over bright surfaces show lower correlation than those over vegetated areas. Both MAIAC Terra and Aqua retrievals are similarly comparable to AERONET AOD over the MODIS lifetime (small bias offset similar to 0.006). Additionally, MAIAC CWV presents quantitative information with R similar to 0.97 and more than 70% of retrievals within error (+/- 15%). Nonetheless, the time series validation shows an upward bias trend in CWV Terra retrievals and systematic negative bias for CWV Aqua. These results contribute to a comprehensive evaluation of MAIAC AOD retrievals as a new atmospheric product for future aerosol studies over South America. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000408346000020 |
WOS关键词 | IMAGING SPECTRORADIOMETER MODIS ; OPTICAL DEPTH ; SURFACE ALBEDO ; RETRIEVAL ; ALGORITHM ; AERONET ; LAND ; CLIMATOLOGY ; UNCERTAINTY ; FIRES |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/32033 |
专题 | 气候变化 |
作者单位 | 1.Brazilian Inst Space Res, Image Proc Div, Sao Jose Dos Campos, Brazil; 2.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA; 3.Brazilian Inst Space Res, Remote Sensing Div, Sao Jose Dos Campos, Brazil |
推荐引用方式 GB/T 7714 | Martins, V. S.,Lyapustin, A.,de Carvalho, L. A. S.,et al. Validation of high-resolution MAIAC aerosol product over South America[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(14). |
APA | Martins, V. S.,Lyapustin, A.,de Carvalho, L. A. S.,Barbosa, C. C. F.,&Novo, E. M. L. M..(2017).Validation of high-resolution MAIAC aerosol product over South America.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(14). |
MLA | Martins, V. S.,et al."Validation of high-resolution MAIAC aerosol product over South America".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.14(2017). |
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